Typewriting machine



Jan. 15, 1935. w. A. DOBSON 1,988,189

TYPEWRITING- MACHINE Filed Sept. 23, 1951 3 Sheets-Sheet Jan. 15, 1935.w. A. DOBSON TYPEWRITING MACHINE- Filed Sept. 23, 1931 5 Sheets-Sheet 2linen/or:

Jan. 15, 1935. w DQB$QN TYPEWRiTING MACHINE Filed Sept. 23, 1931 3Sheets-Sheet 3 Patented Jan. 15, 1935 UNITED STATES PATENT OFFICE-1,9ss,1s9 TYVPEWRITING mom William A. Dobson, Bridgeport, Conn., minorto Underwood Elliott Fisher Company, New York, N. Y., a corporation ofDelaware Application September 23, 1931, Serial No. 564,482

21 Claim.

The upper edge of the sheet slightly bulges be-' tween the sidepaper-fingers, and fouls the usual swingable bail adjacent the platen.

,Moreover, when typing at the top of the sheet, the upper edge thereofdoes not reach the usual bail,'and the operator has to keep it inreleased position,'durin g the first line-spacing operations, until saidupper edge feeds to a position between said released top-rolls and theplaten. If the operator drops the bail before starting to write, asoften happens, the top of the sheet fouls upon the bail. 1 v A featureof the invention is to overcome these drawbacks by enlarging the openingbetween the.

the paper-sheet around the front of the platen to be fed between saidtop-rolls and the platen, and without necessitating any manipulation orreleasing of these top-rolls.

Another feature of the invention is to provide for simultaneous easyrelease of the bottom and top rolls and paper-fingers by a singleoperation. To guide the paper into the throat formed by the platen andtop-rolls, a middle or intermediate top-roll is provided'to co-operatewith a stationary or non-traveling center finger, while the two sidetop-rolls co-operate with side fingers. The latter slide on a tiltablesupport. This center finger deflects the middle of the top of the sheet,so that the upper edge meets the top-rolls in a manner to insureautomatic insertion of said edge under the top-rolls. Another feature ofthe invention is that the bottom feed-rolls, the paper-table, a scalecarrying said paper-fingers, and the top feed-rolls are mountedseparately around theplaten in order to be more easily adjusted, andthat the means supporting the lower end of this papertable-and thisscale respectively are each provided with a bendablepar't allowing aready adjustment of the position of these organs with respect to the)periphery of the platen.

Other features and advantages will hereinafter app ar. f

In the accompanying drawings,

Figure 1 is a cross-sectional view of the platencarriage of an Underwoodportable typewriting machine having the present invention appliedthereto, the section being made along a line indicated by A-A in Figure3. This view shows all the paper feeding and guiding means in theiroperative position.

- Figure 2 is a perspective view of the platen-carriage and a portion ofthe frame-front rail of the structure shown in Figure 1.

Figure 3 is a top-view of the platen-carriage with parts broken away toillustrate the bottom feed-rolls and their release-mechanism.

Figure 4 is a simplified viewsimilar to Figure 1, showing all thefeed-rolls and the paper-fingers in released position.

Figure 5 is a simplified view similar to Figure 1, showinghow thecentral part of the work- .sheet is guided for automatic insertion'underthe central top-rolls by a stationary finger and how the centralpart ofthepaper-table-a'pron rests on the inner side of the frontcarriage-base.

Figure 6 is a simplified view similar to Figure 1, showing that thebottom feed-rolls are restored independently of the top-rolls.

Figure 7 is a perspective view similar to Fisure' 2 with parts brokenaway to better illustrate other parts.

- Figures 8 and 9 aredisassembled perspective views of certain of theparts of the improved top-roll mechanism.

Figure 10 is a simplifiedsectional view similar to Figure 1, showing thefolded position of the rear part of the paper-table.

The work-sheet or pack 10 is inserted from the rear of the machine overa two-section papertable 11, 12, .down between a revoluble platen 13ically guided under said top-rolls 16, on its sides by means of twofront-paper fingers 18 and cenmechanism 103. This work-sheetlo isautomat- I trally by means of a stationary center finger or guide 19. r

In order to create av feeding mouth or flare a large as possible betweenthe top-rolls 16 and the platen 13, the diameter of these top-rolls 16is made as large as permitted by the internal dimensions of thecarrying'case 20 (Figure 1). In

practice it was found that these front rolls would have to be subsantially larger in diameter than the top feed-rolls heretofore used, inorder to create a mouth of sufliciently large flare to insure anautomatic insertion of the work-sheet 10 under the top-rolls 16. In theclass of portable machine herein shown a diameter of .460" was found tobe large enough for the top feed-roll to insure automatic insertion.

In order to accomplish automatically this insertion of the sheet underthe top-rolls, it is desirable that at least three top-rolls 16 be used,that is, one near each side of the sheet co-operating with the lateralpaper-fingers 18 and one substantially in the center of the sheetco-operating with the center finger or guide 19.

In this manner said paper-fingers 18 and said guide 19 deflect the topof the sheet 10 just before its entrance under their respectivetop-rolls 16, so that the upper edge 21 of said sheet meets said rolls16 at an angle which is sufficiently acute by reason of the oversizediameter of said rolls to insure, see Figure 5, that the sheet will beautomatically fed under the top-rolls 16, without any manipulation-orreleasing of said top-rolls or of the paper-fingers being required.

The stationary center guide-finger 19 is slightly separated from theplaten to provide'a clearance for the side paper-fingers 18 on thecarriage to pass thereunder when typing on the extreme outer ends of thework-sheet. Due to the space thus left between the center finger 19 andthe platen 13 the top portions of the sheets 10, when being insertedinto themachine, are liable to bulge away from the platen and toward thecross.- rod forming part of a feedqoll bail 26.

In order to insure that the sheets 10 are de-- flected under thecross-rod 26, the center roll 16 is provided to co-operate with. thecenter guide-finger 19, so that the leading portions of the sheetsimmediately upon leaving the guidefinger'contact with the lower portionof the upper I roll, which is being revolved by the turning of theplaten during the upward feeding of the sheets. This revolving roll 16therefore acts to deflect the sheets to the rear and 'down against theplaten, and under the cross-rod 26, thereby enabling the sheets to beinserted withoutany danger of interfering at their midle portions withthe crossrod.

When the work-sheet 10 has to be aligned, all the rolls 14, 15, 16, andthe two lateral paperfingers 18 are simultaneously removed away from theplaten, so as to give to the sheet the necessary freedom of motion. Thisis done by swinging forward about the platen-axis a release-lever 22mechanically connected through a slot-and-pin connection 23, 24 and alink 25 to the bail 26 carrying the top-rolls 16, and through a link 27,a crank 28 and a cam-shaft '29 to pivoting levers 30 carrying the bottomfeed-rolls'14, 15. Each of the two levers 30, carrying the front bottomrolls 15, presents a nose 31 for engaging an inward extension 32 of atiltable support 32, carrying the paper-fingers 18, and which support,in order to present the paper-fingers against the platen, is urgedinwardly by a pair of springs 33, anchored on the cam-shaft 29. Thus, atthe same time as theupper and lower rolls 14, 15, 16 are simultaneouslyreleased, these noses 3lswing said support 32 against the action ofthese springs 33, so as 'to remove the paper-fingers 18 away from theplaten. The extension 32 may be easily bent to adjust said paper-fingers18 in position with respect to the platen.

In the normal operative position of the feeding and aligning device ofthe invention (Figure 1) the top-rolls 16 are held against thework-sheet 10 with a yielding pressure by means of two W- shaped coiledsprings. Each of said springs (Figure 5) has a tail 34, working inagroove 35, provided in a lug or bail portion 36 of the bail 26; aspiral body 37, wound around a collar-nut 38, fixed by screw 39. to theend-plate 40 of the platen-carriage 41; and a fixed end 42 reactingagainst the inner side of the front rail 43 of the platen-carriagebase-plate 41. This arrangement permits ready removal of the bailwithout entailing dismantling of the springs.

The bottom feed-rolls 14, 15 are likewise yield ingly held pressedagainst the work-sheet 10 by four W-shaped springs 44, hooked at one endat 45 under each lever 30 and reacting against the base-plate of theplaten-carriage 41 at their other end 46, while the springs 33 tend topull the tiltable support 32 towards the platen, and there-.

by cause the paper-fingers 18 to press said work sheet 10 against theplaten 13.

In this normal operative position, the pin 24 carried at the rear end ofthe link 25 is almost at the rear end of the circular slots 23, 'aslight space 47 (Figure 1) being provided for the freev cam-shaft 29,said flats being then in a substan- I tially horizontal position. Theseflats are on one side of the cam-shaft only andeach fiat may serve apair of opposite levers 30.

When the release-lever 22 is brought forward in the position of Figure4, the two flats 50 are turned to a substantially vertical position, and

the four levers 30 are swung against the action of said springs aboutstuds 51, inwardly projecting from two end-brackets 52, secured byscrews 53 to the base-plate 41 of the platen-carriage 41, therebyreleasing the bottom feedrolls 14, 15.

These end-brackets 52 are also used as bearings for thecam-shaft 29,which has, near the crank 28, a third bearing 54 secured to theplatencarriage by screws 55.

Swinging of the lever 22 backwards restores the flats 50 totheirhorizontal position, thereby releasing the levers 30 to the action ofthe springs 44, 45, 46 and the rockable support 32 to the action' of thesprings 33. Hence these springs close simultaneously the bottomfeed-rolls 14, 15 and the paper-fingers 18, while the top-rolls 16remain in their released position, as, during this backward movement ofthe lever 22, the pin 24 merely slides along the "circular slot 23(Figure 6). Due to the slot-and-pin connection 23,

24, when the release-lever 22 is in its normal position (Figure 1) saidtop-rolls 16 may be opened by a light firm pull on the rod of the bail26 opened (Figure 4) and closed "(Figure 6) independently of thetop-rolls 16.

The release-lever 22 is mounted at one end of the platen 13'ona boss56,inwardly projecting I from the end-plate 40 of the platen-carriage41" and serving also as bearing for the platen-shaft 5'1. Its slot 23projects forwardly beyond the end of the travel of the pin 24, and, forassembly convenience,'ends in an enlarged opening 58 allowing a readyinsertion of the head of the collar-screw forming the pin 24. I

The two end-arms of the bail 26 are offset at 59, so as to fit below thecover 60 of the end-. plates 40 close against the inner wall of saidlatter. One of these arms is permanently secured to the rod of the bail26 by riveting or soldering, while'the other arm has a rectangularopening 61 and is removably fixed on a rectangular end 62 of said bar bymeans of an end-screw- 63 (Figure 9), in order to allow a readyplacement or removal of the top-rolls 16 on or from the rod of the bail.Though these rolls 16 may be easily adjusted in position along said rod,so as prises four rolls 14 mounted at intervals on a shaft 65, saidshaft being shouldered at its ends for. retention in sockets 66 providedat the outer ends of the two rear levers 30, while the row of frontpressure or feed rolls comprises likewise four rolls 15 mounted atintervals on a shaft .67, similarly held in the sockets 66 of thetwo-front levers 30.

The paper-fingers 18 are slidably mounted,

by means of hooks 68, on a rod or rail 69, located in front of theplaten 13 below the printing line. This rod 69 is fixed near its ends bybolts 70 to the tiltable supports 32 and is spaced by washers or shims'71 from; a conventional front scale 72, secured thereto at both ends bymeans of screws 73. The clearance thus'p'rovided between the rail or rod69 and the front scale 72 thus allows the paper-fingers 18 to be movedlaterally along the rail for marginal engagement with sheets 10 ofdifferent widths. To stabilize this sliding movement the paper-fingersare furthermore guided along the upper edge of the front scale by meansof stamped-out tongues 74, bent over said edge,

By bending the projections 32' of thesupport 32', the operative positionof said scale '72 and of the paper-fingers 18 may be readily adjustedrelatively to the platen.

Each support 32, projecting downwardly from the rod 69, is provided withan opening 75 and a stamped-out tongue '76, projecting insaid openingand serving as a hook for'one of the springs 33. It is also provided atits lower'end with a pair of tenons '17. These four tenons are looselyengaged into mortises 78, provided in the baseplate 41, play beingprovided to allow the necessary tilting movement of said tenons in saidmortises when the paper-fingers 18 are released by thefeed-roll-carrying levers 30.

The stationary center finger orguide 19 is formed as an upwardprojection of the righthand wing '19 of the usual wing-scale 79.indicates the left-hand wing of said wing-scale, which is secured bymeans of screws 81 to a pair of lugs or flanges 82, projectingdownwardly from the front frame-rail 83. The relative position of theoperative end of said center'flnger 19 with adjusted by merely bendingsaid upward profront of the machine, said rear part 11 is made foldableand is pivotally fastened to the remaining lower part 12 and to theend-plates 40 by means of two collar-screws 86 screwed in twocylindrical sockets 87 fastened to said end-plates 40 in any suitablemanner. Thus this upper part 11 of the paper-table may be swung forwardagainst the platen 13 as shown in Figure 10, so as to uncover thetabulating mechanism. This foldable part 11 of the paper-table is linedwith a layer 88 of a noise-deadening material as; for instance, felt.The two sockets 87 act also as abutments to center the paper-table inproper align-- ment with respect to the platen 13. The lower part orapron 12 of the paper-tab is curled at its upper end for support by saidcollar-screws '86, and is freely supported at its lower end, atboth'sides, by means of a pair of outwardly-turned flanges 89 of thebrackets 52 and at the center by means of a down-turned projection 90acting as a supporting footand resting on the carriage-base-plate 41.These two flanges 89 may be bent up to adjust the position of said lowerend of said apron 12 with respect to the periphery of the platen, thisfoot 90 being then shortened or lengthened in a corresponding manner bybeing bent. A row of openings or clearances 91 is provided in said apronl2 for the rear feed-rolls 14, while the front edge thereof is providedwith four notches 92 for. the front feed-rolls 15. The adjoining edgesof the two parts 11, 12 of the paper-table include an intermediate orcenter part formed by an offset upward projection 93 of the lowerpart12, carrying a flat spring- 94, and by a downwardly-projectingtan-portion 95 of the upper part 11,

which works into an'opening '96 of the part 12 and co-operates with thefree end of said spring 94, so as to hold said upper part fast either inits normal or folded position.

The paper-table 11, 12 may thus be very easily dismounted and removedfrom the machine by merely unscrewing the two screws 86.

97 and98 indicate respectively the rear frame- 1. A typewriting machinecomprising in combination, a supporting frame, a carriage traveling insaid frame, a revoluble platen journaled in end plates of said'c'arriag'e,-. releasable bottom feedrolls to co-operate witli saidplaten, a release mechanism for said feed-rolls having a ma;uallyoperated controlling member arranged to swing about the platen-axisfor castingoff and restoring t e bottom rolls, a front bail pivotallymou nted on said end plates, auxiliary top rolls co-operating with theplaten and adjustable along the rod of said bail, and a pin and-slotmechanical connection between said bail and said manuallyoperatedcontrolling member, said member having a circular slot concentric withthe platenaxis in which plays the pin of said connection which isarranged to cast off said bail upon movement of said member to releasingposition and to leave said bail cast off upon restoration of saidmember.

2. A typewriting machine comprising in combination, a supporting frame,a carriage traveling in said frame, a revoluble platenmounted on saidcarriage, releasable bottom feed-rolls to co-operate with said platen, arelease mechanism for said feed-rolls having a manually-operatedcontrolling member, a pair of paper-fingers, lat-- erally-adjustablealong a bar, pivotally mounted on said carriage separately from thelower feedrolls, a bail pivotally mounted separately from said bar onsaid carriage in front of said platen, and auxiliary front top rolls onsaid bail, said release mechanism, said paper-finger bar and said bailhaving connections whereby said bottom feed rolls, said top rolls andsaid paper-fingers may be simultaneously removed away from the platen bya single manual operation of said controlling member, said connectionsbeing arranged so that said top rolls may be cast off separately fromsaid bottom rolls and paper-fingers.

3. A typewriting machine comprising in combination, a supporting frame,a carriage traveling in said frame, a revoluble platen mounted on saidcarriage, releasable bottom feed-rolls to 00-01)- er'ate' with saidplaten, a release mechanismior said feed-rolls having amanually-operated controlling member, a pair of paper-fingers, laterallyadjustable along a bar, pivotally mounted on said carriage separatelyfrom the lower feed-rolls, a bail pivotally mounted separately from saidbar on said carriage in front of said platen, and auxiliary front toprolls on said bail, said release mechanism, said paper-finger bar andsaid bail having connections whereby said bottom feedrolls, said toprolls and said paper-fingers may be simultaneously removed away from theplaten by a single manual operation of said controlling member, saidconnections being arranged so that said bail or paper-finger bar may beshifted from the platen separately from the bottom feed-rolls and fromone another.

4. A typewriting machine including, in combination, a carriage providedwith end-members, a revoluble platen mounted on a shaft journaled insaid end-members, releasable bottom and top feed-rolls and paper-fingersto co-operate with said platen, and a release mechanism forsimultaneously releasing said bottom and top feed-' rolls and saidpaper-fingers and arranged so as not to be dismantled when said platenand shaft are removed from said carriage, said release mechanismincluding a manually-operable controlling membenone of said carriage-endmembers having a laterally-projecting boss surrounding said shaft, saidcontrolling member being pivoted on the periphery of said boss so thatits fulcrum is substantially coaxial with the platen-shaft to compactsaid mechanism and yet being operative when the platen-shaft is removed.

5. A typewriting machine comprising in com bination, a supporting frame,a carriage traveling in said frame, a revoluble platen journaled in'said carriage, releasable bottom feed-rolls to cooperate with saidplaten, a release mechanism for said feed-rolls having amanually-operated controlling member rotatable for casting off andrestoring the lower feed-rolls, a front bail pivotally mounted in saidcarriage, auxiliary top rolls co-operating with said platen andadjustable along a cross-rod of said bail, a circular slot beingprovided in said manually-operated controlling member, said slot beingconcentric with the'axis of rotation of said member, and a link pivotedat one end on said bail and carrying at its opposite end a pin workingin said slot.

6. A typewriting machine comprising in combination, a supporting frame,a carriage traveling in said frame, a revoluble platen journaled in endplates of said carriage, releasable bottom feedrolls to co-operate withsaid platen, a release mechanism for said feed-rolls having amanuallyoperated controlling member, a front bail pivotally mounted onsaid end plates, auxiliary top rolls on said bail, a pin-and-slotmechanical connection between said ball and said manually-op- "eratedcontrolling member, effective to cause the top feed-rolls to be cast offwith the bottom feedrolls and ineffective to return the top feed-rolls,

lugs on the end arms of said bail, and cylindrical torsion springsreacting against said carriage and having tails co-operating with saidlugs, said tails, lugs, and the bail-pivots being relatively 8.1",ranged so that said top rolls are caused to be pressed bysaid tailsagainst the platen in operative position of thebail and so that the bailis held by said tails in its idle or released position against a stop,the spiral bodies of said springs being wound around collar-nuts securedto said end plates. v

'7. A typewriting machine comprising in combination, a supporting frame,a carriage traveling in said frame, a revoluble platen journaled in end.plates of said carriage, two rows of releasable bottom feed-rollscarried by a front shaft and a rear shaft to co-operate with saidplaten,a.

manually-operated release lever for said feedrolls mounted on one ofsaid end plates, brackets mounted on said carriage, a'cam-shaftjournaled in said brackets and forming a unilateral line of cams, alink-and-crank connection between said lever and said cam-shaft,two-pairs of opposed levers mounted in said brackets and pivoted onopposite sides of said cam-shaft, both of a pair of said levers havinginner arms extending toward and engaging the same cam, and four W-shaped springs wound around extensions of the pivots for said levers,said springs reacting against said carriage at one end and being hookedaround the outer arms of said levers at their other ends, so as toyieldingly press said feed-rolls against the platen in normal positionof said release lever.

8. A typewriting machine comprising in combination, a supporting frame,a carriage adapted to move to and fro along said frame, a revolubleplaten mounted on said carriage, bottom and top releasable feed-rolls, afront scale andguidlng paper-fingers to co-operate therewith, a tiltablesupport for said front scale and said paper-fingers pivotally mounted onsaid carriage, a front shaft and a rear shaft to carry said bottomfeed-rolls, two pairs of opposed pivoting levers to carry said twoshafts, a cam-shaft controlling the release of said bottom-feed-rolls byswinging simultaneously said four levers, a projecting nose integrallyformed in the front levers of each of said pairs of pivoting levers, andpull-springs anchored around said cam-shaft and acting on said tiltablesupport, so as to hold it constantly in abutting relation against saidnoses, in order that said paper-fingers to co-operate with the frontpart of said platen, a front scale, a tiltable support below theprinting line for said paper-fingers and said front scale arranged in asubstantially vertical position in front of said platen and providedwith loose mortise-and-tenon connections to said base-plate, which actas pivots for said support with a minimum of friction, said tiltablesupport being actuable by said release mechanism, top rolls toco-operate with said. platen above the printing line, and a swingablebail, to carry said top rolls, arranged in front of the platen abovesaid tiltable support.

10. A typewriting machine comprising in combination, a supporting frame,a carriage having a base-plateand two end plates and traveling in saidframe, a revoluble platen mountedon said carriage between said endplates, a foldable paper-table including an upper part behind theplaten,'said upper part swingable about pintles projecting from said endplates and also including a lower part supported by said pintles andresting upon said carriage, rear and front bottom feed-rolls toco-operate with said platen, a release mechanism forsaid feed-rolls, apair ofguiding paper-fingers, a front scale, a tiltable supportpivotallymounted in said base-plate below the printing lineandoperatively connected to said release mechanism, said supportcarrying said front scale, and also supporting said paperfingers forlateral adjustment, a stationary guiding paper-finger carried by saidsupporting frame, a dismountable bail pivotally mounted on said endplates in front of said platen and operatively connectedto saidreleasemechanism, and three top rolls of oversize diameter adjustable along therod'of said bail so as to co-operate with said three paper-fingers.

- 11. A typewriting machine comprising in combination, a supportingframe, a carriage having a base-plate and two end plates and travelingin lower part or apron of the paper-table, a release a mechanism forsaid feed-rolls, a pair 'of guiding paper-fingers, a front scale, atiltable support pivotally mounted in said base-plate below the printingline and operatively connected to said release mechanism, said supportcarrying said front scale, and also supporting said paper fingers forlateral adjustment, a stationary guiding paper-finger carried by saidsupporting frame, a

, dismountable bail pivotally mounted on said end therod of said bail soas to co-operatewith said three paper-fingers, said paper-fingersreaching upwardly close to the points where the top rolls contact theplaten.. 12. A typewriting machine comprising in combination, asupporting frame, a carriage'having a. base-plate and two end plates andtraveling *in said frame, a revoluble platen mounted on said carriagebetween said end plates, a foldable paper-table in two parts, upper andlower, hinged together by means of pintles projecting from said two endplates, the lower partresting upon said carriage, rear and front bottomfeed-rolls to cooperate with said platen, a release mechanism for saidfeed-rolls, a pair of guiding paperflngers, a 'front scale, aspring-pressed tiltable support carrying said paper-fingers and scale,

said support being pivotally mounted in said base-plate and beingoperatively connected to said release mechanism, a stationary guidingpaper-finger carried by said supporting frame and slightly spaced fromthe platen-periphery to clearsaid pair of other guiding fingers as thecarriage travels, a dismountable bailpivotally mounted on said endplates in front of said platen and operatively connected to said releasemechanism, and three top rolls of oversize diameter adjustablealong therod of said bail so as to co-operate with said three paper-fingers, saidpaper-fingers extending upwardly to reach closelyv the points where saidtop rolls contact the platen.

13. A typewriting machine comprising in combination, a supporting frame,a.carriage having a base-plate and two end plates and traveling in saidframe, a revoluble platen mounted on said carriage between said endplates, a foldable paper-table in two parts hinged together andpivotally mounted on said two end plates; said table resting upon saidcarriage, rear and front bottom feed-rolls'to co-operate with saidplaten, a release mechanism for said feed-rolls, a pair of guidingpaper-fingers, a front scale, a tiltable support carrying saidpaper-fingers and scale, said support being pivotally mounted on saidbase-plate and being operatively connected to said release mechanism, astationary guiding paper-finger carried by said supporting frame, a

dismountable bail pivotally mounted on said end plates in front of saidplaten and operatively connected to said release mechanism, three toprolls of. relatively large, diameter adjustable along;

14. A typewriting machine comprising in com bination, a carriage, arevoluble platen therein, a paper-table having a stationary apron underthe platen, bottom feed-rollsjmeans operable-to re,-, lease'said bottomfeed-rolls, front paper-fingers, a support carryingsaid paper-fingersfor lateral adjustment and pivotally mounted on said rear riage atpoints apart from and below said apron, said support connected to saidbottom feed-rollrelease means so that said fingersmaybe released fromsaid platen conjointly with said bottom feed-rolls, top feed-rolls, anda bail carrying said top feed-rolls for lateral adjustment and swingable to'move. the latter againstand from the platen, said paper-fingersterminating at their upper ends below the point where the top feedrollscontact the platen so that said paperfingers andsaid top rolls areindependently ad- 'justable, one from the other, throughout the lengthof the platen.

15. A typewriting machine comprising in combination with a carriage 'and'a revoluble platen therein, a stationary paper-guiding apron under theplaten, a support, mounted in front of said platen and apart from saidapron and pivotally articulated to the carriage-frame so as to betiltable, front paper-fingers carried by said support, means operativeto tilt said support about its pivots to bring the paper-fingers towardand from the platen, said paper-finger support having a portion abuttinga stop apart from said apron to determine the normal position of saidsupport and which portion and stop may be relatively bent for adjustmentpurpose, and spring-means drawing said support against said stop todetermine the relative position of said fingers with respect to theperiphery of said platen.

16. The combination with a revoluble typewriter-platen, of front andrear bottom feed-rolls cooperating with said platen, means for mount ingsaid feed-rolls including a plurality of pairs of opposite pivotedlevers having. outer arms for supporting said feed-rolls, a cam-shaft,spaced supports in which said cam-shaft is journaled, said cam-shafthaving, formed on one side only, lever-controlling cams, the levers ofeach pair being pivoted on studs extending from the same side of one ofsaid supports and having inner arms extending toward and engaging thesame cam which is limited in its extent toward said support-side so thatthe cam-shaft has a fully circumferential bearing in said support, saidshaft being operable to turn said levers for simultaneously releasing orrestoring the front and rear feed-rolls, and torsion springs forpressing the feed-rolls against the platen, each spring being coiledabout an extension of one of said studs for support. j

17. The combination with a revoluble typewriter-platen, of front andrear bottom feedswingably mounted on the outer periphery of one of theplaten-bearings so as to compact the mechanism by being coaxial with theplaten-shaft and still be operative when said platen-shaft is removed,said'member having an upwardly-extending arm forming a finger-piece andalso having an arm connected by a link and a crank to said cam-shaft;

18. The combination with a revoluble typewriter-platen mounted in acarriage having a base-member below the platen, and a fixed apron underthe carriage of a line of bottom feed-rolls, a plurality of leverssupporting said feed-rolls, a cam-shaft engaging said levers andoperable to release and restore said feed-rolls from and to the platen,and a tiltable paper-finger support pivotally mounted on thecarriage-base member apart from said apron, said support beingspringpivotally mounted on the carriage-base member apart from saidapron, said support being springpressed toward and displaceable by saidlevers whereby, upon release or restoration of the feedrolls, thepaper-fingers are also released and restored, said support having aloose mortise-andtenon connection with said base-member whereby it ispivoted upon said member.

20. In a typewriting machine, the combination with a carriage, arevoluble platen therein, feedrolls co-operating with the platen, andfeed-rollrelease mechanism, of a front scale and paperfinger mechanismincluding a bar, a front paperscale on said bar, paper-fingersadjustable along said bar, downward extensions of said bar hav-- ingloose mortise-and-tenon connections to the carriage whereby saidpaper-finger mechanism is pivotally connected to said carriage, and

springs urging said bar to rotate about the pivotconnections thus formedto thereby draw said paper-fingers against the platen, said paper-.finger mechanism being releasable from said platen by saidfeed-roll-release mechanism. I

21. 'In a typewriting machine, the combination with a platen, of afolding paper-table including an apron slanting upwardly and rearwardlyfrom the bottom of the platen and also including a leaf hinged to saidapron at the rear upper edge of the latter to form a forwardly-foldableupward and rearward extension of the lower apron, a tongue beingprojected from said upper edge to underlie and support said leafsubstantially even with said lower apron, a second tongue and a springco-operating therewith being provided along the adjoining edges of. saidleaf and apron to hold said leaf in normal or folded position, saidsecond tongue and spring forming parts of said leaf and apron.

WILLIAM A. DOBSON.

